Methine compounds

ABSTRACT

A methine compound of the formula,   which is a useful intermediate for the production of a yellow coumarine dye of the formula   The methine compound is prepared by condensing an aldehyde derivative of the formula   with a compound of the formula X-CH2-Y. The yellow coumarine dye is prepared by condensing the methine compound with one of the following:   Each of the R1 and R2 is hydrogen, substituted or unsubstituted alkyl or cycloalkyl, or R1 and R2 may form a heterocyclic ring together with the nitrogen atom and other atoms; X is cyano, carbamoyl, carboalkoxy or carboxylic acid; and Y is carbamoyl or cyano, and A is a benzene or naphthalene ring which may be substituted.

United States Patent [191 Ikeda et al.

[ Oct. 21, 1975 METHINE COMPOUNDS [75] Inventors: Tsuneo Ikeda, Toyonaka;

Katsunobu Sato, Minoo; Hiroshi Sugiyama, Ashiya, all of Japan [73] Assignee: Sumitomo Chemical Company, Ltd.,

Osaka, Japan [22] Filed: Dec. 29, 1972 21 Appl. No.: 319,816

[30] Foreign Application Priority Data Apr. 14, 1972 Japan 47-37916 Dec. 28, 1972 Japan 47-3484 [52] US. Cl 260/465 D; 8/178 R; 8/179;

260/243 R; 260/247.2 A; 260/247.2 B;

260/247.2 R; 260/247.7 R; 260/256.4 Q;

260/256.5 R; 260/268 PH; 260/293.75;

260/465 E; 260/471 R; 260/519; 260/559 A [51] Int. Cl. ..'C07C 121/80 [58] Field of Search 260/465 E, 465 D [56] References Cited UNITED STATES PATENTS 9/1964 Kladko et al. 260/465 5/1970 Cyanagisawa et al. 260/465 X Primary Examiner-Elbert L. Roberts Assistant Examiner-Dolph H. Torrence Attorney, Agent, or FirmSughrue, Rothwell, Mion, Zinn & Macpeak [57] ABSTRACT A methine compound of the formula,

which is a useful intermediate for the production of a yellow coumarine dye of the formula The methine compound is prepared by condensing an aldehyde derivative of the formula CHO N OH

with a compound of the formula XCH,-Y. The yellow coumarine dye is prepared by condensing the methine compound with one of the following:

cyano, and A is .a benzene or naphthalene ring which may be substituted.

3 Claims, N0 Drawings METHINE COMPOUNDS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to novel methine compounds,

a process for preparing such methine compounds and to a process for preparing a coumarine derivative (yellow dye) using such methine compounds.

2. Description of the Prior Art The coumarine derivatives described in Belgian Pat.

No. 745740-Q and Dutch Pat. No. 7001885 are suit-- able for dyeing and printing hydrophobic fibers such as acetate, polyester or polyamide fibers and are also used for coloring synthetic resins such as polyethylene, polystyrene, polypropylene, polyvinyl chloride or polymethyl methacrylate. They emit a strong yellow fluo: rescence under ultraviolet rays or sunlight, and give a very vivid yellow color having good fastness to light.

Until the efforts of the present inventors, however,

ducing the coumarine derivatives set out in the above patents which is sufiicient for'industrial production.

SUMMARY OF THE INVENTION The present inventors, after extensive studies, have reached a process for the production of such useful N OH wherein each of R and R is hydrogen atom, a substituted or unsubstituted alkyl group or a cycloalkyl group; R and R may form a heterocyclic ring together with the nitrogen atom and other atoms; X is cyano group, carbamoyl group, a carboalkoxy group or car boxylic acid group; and Y is carbamoyl group or cyano;

- wherein R, and R are the same as defined above, with a compound of formula (III).

X CH2 Y ("D7 wherein X and Y are the sarne as defined above, in an inert organic solvent at room temperature or at an ele- I vated temperature; and also provides a process for pre-' I paring a dye of general formula (IV);

' no-process has been available to the prior art for pro-' provides a process for preparing the methine compound of formula (I), which process comprises condensing an aldehyde derivative of formula (II),

wherein'R and R are the same as defined above, and

A is a benzene or naphthalene ring whichis unsubsti-. J tuted or substituted with at Ieastone group other than a water-soluble group, such as a carboXylic group'or sulfonic acid group, which comprises condensing the methine compound of formula (I) with a compound selected from the group consisting of isatoic acid derivatives' of formula (V),

wherein A is the same as defined above, anthranilic acid amide derivatives of formula (VI),

wherein A is the same as defined above, said anthra- .nilic acid derivatives of formula (VII),

wherein A is the same as defined above, in an inert organic solvent at an elevated temperature.

rm f

In the present inventiongthe terntfalltylf is intende 1 groups, nitro group, thiocyano group, alkanoyl groups, tomean an alkyl. rou'pghavi ngl to {l carbon atom 'alkylsulfonyl groups, carboalloxy groups, sulfonic acid amples of th-alkylgrbup and substituted alky g; up alkyl ester groups,sulfonic acid amide groups, N-alkyl include the following: methyl group, ethyl grail or N,N-dialkylsulfonic acid amide groups. B-chloroethyl group, ,B-hydroxyethyl group, B-me- 5 The condensation reaction for producing the coumathoxyethyl group, B-acetoxyethyl group, B-cyanoethyl rine. dye includes: two. cyclization reactions. Usually, group, ,B-carbomethoxyethyl group, benzyl group or however, these cyclization reactions take place simulcyclohexyl group. Examples of the heterocyclic ring taneous l y or with a very slight time difference and formed by R and R together with the nitrogen atom therefore different intermediate cyclized products ,can and other atoms are a piperindino ring, pyrrolidino ring hardly be detected. Since the reactions take place aland morpolino ring. most simultaneously and in good yields, operations to recover the intermediate product are not required, and DETAILED DESCRIPTION OFTHE INVENTION the process proves commercially advantageous.

The novel methine compound of the formula (I) is If the same solvent is used both in the preparation of prepared by react-ing the aldehyde derivative of forthe methine compound and in the preparation of the mula (II) with ,the; compound of formula (III) in an coumarine dye using the methine compound, the con-,7,

inert organic solvent. Preferably, the condensation. redensation reaction for preparing the dye and the meth-.

action is carried out at about 0C to about 50C. Deine compound can be carried out successively without pending upon the kind of the solvent, a side-reaction the need for an intermediate recovery of the methine may take place at a temperature higher than 50C. to compound.

cause the self-cyclization of the methine compound to With the progress of the reaction for preparing the a coumarine ring. dye, carbon dioxide gas and ammonia, alcohol, water,

Examples-of suitable solvents are alcohols such as etc. are formed corresponding to group X in the methmethanol, ethanol, isopropanol, isobutanol or ethylene ine compound. These byproducts can be released singlycol monoalkyl ethers aliphatic solvents such as dioxgly or as azeotropes with a soluvent out of the reaction ane, diemthyl formamide, dimethyl sulfoxide or chlorosystem. form, and aromatic solvents such as chlorobenzene, ni- The invention will now be illustrated by the following trobenzene or toluene. Examples, in which all parts are by weight.

Specific examples of compounds within formula (III) EXAMPLE 1 are cyanoacetamide, malonic acid diamide, malonic 3O acid monoamide and carboethoxy acetamide. Into a reactor were charged 600 parts of methanol,

In order to promote the reaction, a basic catalyst 42 parts of cyanoacetamide, 96.5 parts of 4-N,N- such as piperidine, triethylamine, diethylamine or sodiethylamino-Z-hydroxybenzaldehyde and 5.3 parts'of dium alcoholate may be added to the reaction system. piperidine;.and the mixture wasrstirred for 5 hours at i After completionof the reaction, the reaction mix- 4074596 Th'ereaction mixture was cooled to 10C.,

ture is sufficiently cooled to precipitate crystals of the and filtered. The resulting crystals were washed with desired product. By filtering the precipitated crystals, I 150 parts of methanol anddried to 'yield 1 I Oparts of a final product of high quality can be obtained. yellow crystals, which had a melting I point of The reaction for the preparation of the yellow l6 7? l68C. and which were identified by elementary coumarine dye of formula (IV) is carried out by conanalysis and the infrared absorption spectrum thereof densing the novel methine compound of formula (I) to-be acompound of the following formula, with a compound selected from those of formulae (V), (VI) or (VII) in an inert organic solvent at an elevated temperature. Examples of suitable solvents are aromatic solvents such as chlorobenzene, odichlorobenzene, nitrobenzene, toluene or xylene, aliphatic solvents such as solvent naphtha, tetrachloro- N ethylene, tetrachloroethane or trichloroethylene, alcohols such as ethanol, isopropanol, isobutanol or ethylene glycol monoalkyl ethers, and other solvents such as t i dimethyl formamide, dimethyl acetamide, dimethyl X PLE 2 sulfoxide, diphenyl or diphenyl ether. The temperature may vary over a wide range according to the solvent to" be used, but preferably the reaction temperature is from 70C to 160C. 7 It is not especially necessary to add a reaction promotor, but if desired, a compound such as boric acid, aluminum chloride, zinc chloride, benzene or toluenesulfonic acid may be added as the promoter.

The isatoic acid derivative of formula (V-)'can-be ,;ob "5C2 tained in a known manner by'reacting-a'substituted;or unsubstituted anthranilic acid or o-aminonaphthoic acid with phosgene, or by oxidi zing'phthalionide or a lnaphthalenedicarboxylic acidimide. I L

In the compounds of formulae (IV), (V), (VI) and (VII), examples of the substituents attached to ring A I I fi are halogen atoms, lower .alkyl groups, lowenallcoxy Intoare'actor were charged 600 parts of 'methanol,

CH=C;CONH

CONH

N OI-I Example 1 was repeated except that 51 parts of irialonic' acid diamide was used. instead: (hf '41 parts of 55 cyanoacetamide. Elementary analysis showed that thef product was a compound of the following formula.

42 parts of cyanoacetamide, 82.5 parts of 4-N,N- dimethylamino-2hydroxybenzaldehyde and 5.3 parts of piperidine, and the mixture was stirred for 5 hours at 40-45C. The reaction mixture was cooled to C.,

10C. and'filtered. The resulting crystals were washed with 150 parts of methanol, and dried to yield 135 parts of yellow crystals having a melting point of 1l71 18C. The yellow crystals were identified to be and filtered. The resulting crystals were washed with 5 a compound of the following formula by elementary 150 parts of methanol, and dried to yield 98 parts of analysis and the infrared absorption spectrum thereof. yellow crystals, which showed a melting point of l82-183C. The crystals were identified to be a compound of the following formula by elementary analysis and the infrared absorption spectrum thereof. 10

11. COH C.

a 4 z N OH ii comc CH= F-CONH2 EXAMPLES 5 3 H C to l N OH The procedure similar to that of Example 1 were repeated to yield the following novel methine com- Hac pounds.

Examples R R; X Y

5 --C,l-15 -C,H -cooc1-1, CONH, 6 -C- .H, -c,|-1 COOH CONH, 7 C H. c,1-1 CONH, CN 8 H H CN cown, 9 c,H, C,H.Cl -CN c01-111 10 --C,H, -C,H.0H CN CONH,

11 c11, -11 CN CONH,

12 -CH,-cH,- G H -CN CONH,

13 H CN CONH,

14 -C,H,, --C,H.CN CN CONH: 1s c,H,ococ1-1 -c,H,ococH, CN CONH, l6 cz11.cooc1-1. --c,1i,cooc11 CN CONH, 17 --c,11,oc0oCH C,H.OCOOCH3 CN CONH,

CH,c1-1, 1s 0 1-1 CN --cor-111 \CHZCH CH CH 19 s z N- CN co1-111z CHZCH,

c1-1,ci-1 20 HN N CN CONH,

CH CH 21 H,c N- CN CONH CH,CH 22 -c,1i -c,H -c0oc,1i -coN1-1, 23 C4H: C4Hn CN CONH; 24 Cgl'hOCgHs C,H4OC2H 5 CN CONH, 25 c,1-1.0C,H. c,H,0c,1-1, CN c01-111 26 --C,1-1,0C0c,11 -c,1-1,ococ,1i CN CONH, 27 -c,1-1,ocooc,11, C,H,0C00C,H CN CONH,

28 -C,H,o- -1-1 CN CONH,

29 c1-1,cooc,11 H CN CONH, 30 -c1-1,C0oc11, -1-1 CN CONH, 31 11 CN CONH,

EXAMPLE 4 EXAMPLE 32 Into a reactor were charged 600 parts of methanol,

42 parts of cyanoacetamide, 126.5 parts of 4-N,N- dimethoxyethylamino-2-hydroxybenzaldehyde and 5.3 parts of piperidine, and the mixture was stirred for 5 hours at 40-45C. The reaction mixture was cooled to 25.9 Parts of the methine compound obtained in Example 1 and 19.2 parts of isatoic acid anhydride were put into parts of dimethyl formamide, and the mixture was stirred for 5 hours-at llOl20C. The reaction mixture was filtered at room temperature. The reby elementary analysis.

N c \NC Acetate, polyester and polyamide dyed with this compound showed a fluoroscent yellow color and had good fastness characteristics, e.g., in particular, light fastness. Other fastness characteristics such as sublimation fastness and washing features were also good.

EXAMPLE 33 27.7 Parts of the methine compounds obtained in Example 2 and 19.2 parts of isatoic acid anhydride were put into 150 parts nitrobenzene, and the mixture was stirred for'3 hours at l20-140C. The reaction product was cooled to 80C. 75 Parts of methanol was added dropwise over the course of one hour, and after the end of addition, the mixture was stirred for 1 hour at 25C. The precipitated crystals were filtered, washed with 50 parts of methanol, and dried to yield 25.2 parts of yellow crystals which were found to be the same com pound as that obtained in Example 32.

Similar products were obtained when the methine compounds obtained in Examples 6 and 22 were used instead of the methine compound obtained in Example 2.

EXAMPLE 34 25.9 Parts of the methine compound obtained in Example l and 13.6 parts of anthranilic acid amide were put into 150 parts of dimethyl foramide, and the mixture was stirred for 5 hours at l 10l C. The product was filtered at room temperature. The resulting crystals were first washed with parts of dimethyl formamide Acetate, polyester and polyamide dyed with this compound showed a fluoroscent yellow color and had good fastness characteristics as in Example 32.

EXAMPLE 35 27.7'Parts of the methine compound obtained in Example 2 and l36parts of anthranilic acid amide were put into 150 parts of nitrobenzene, and the mixture was stirred for 3 hours at 120-140C., followed by cooling to C. Methanol (75 parts) was added dropwise over the course of one hour, and after the end of addition, the mixture was stirred for 1 hour at 25C. The crystals which precipitated were filtered, washed with 50 parts of methanol, and dried to yield'25.2 parts of yellow crystals which were found to be the same compound as that obtained in Example 34.

Similar products were obtained when the methine compounds obtained in Examples 6 and 22 were used instead of the methine compound obtained in Example 2.

EXAMPLE 36 25.9 Parts of the methine compound obtained in Example 1 and 13.7 parts of anthranilic acid were put into 150 parts of dimethyl formamide, and the mixture was stirred for 5 hours at ll0l 20C. The product was filtered at room temperature. The resulting crystals were washed first with 50 parts of dimethyl formamide and then with parts of methanol, and dried to yield 27 parts of yellow crystals, which had a melting point of 267-268C. The crystals were identified to be a compound of the following formula by elementary analysis.

C/N n.0, \N--C KI IO .7 H.c,

Acetate, polyester and polyamide dyed with this compound showed a fluorescent yellow color and had good fastness characteristics as in Example 32.

EXAMPLE 37 27.7 Parts of the methine compound obtained in Example 2 and 13.7 parts of anthranilic acid were put into parts of nitrobenzene, and the mixture was stirred for 3 hours at l20l40C., followed by cooling to 80C. Methanol (75 parts) was added dropwise over the course of one hour, and after the end of addition, the mixture was stirred for 1 hour at 25C. The precipitated crystals were filtered, washed with 50 parts of methanol and dried to yield 25.2 parts of yellow crystals which were found to be the same compound as that obtained in Example 36.

Similar products were obtained when the methine compounds obtained in Examples 6 and 22 were used instead of the methine compound obtained in Example 2.

EXAMPLES 38 to 76 Coumarine dyes shown below were prepared in the same way asset forth in Examples 32-37.

EXAMPLE 77 A mixture of 42 parts of cyanoacetomide, 96.5 parts of 4-N,N-diethylamino-2-hydroxybenzaldehyde, 5.3

parts of piperidine and 600 parts of nitrobenzene was stirred for 5 hours at 30 to 40C., and thereafter heated to 90 to 100C. 89.6 parts of isatoic anhydride was added dropwise thereto over a one hour period while the system was maintained at 90 to 100C., and the mixture was further stirred for 2 hours at 100 to 1 C. After lowering the temperature to 70C., 300 parts of methanol was added dropwise to the reaction mixture. The temperature was further lowered to C and thereafter the reaction mixture was stirred for 2 hours at 20C. The deposited crystals were filtered, washed with 300 parts of methanol, and then with water, and dried, whereby 115 parts of yellow crystals was obtained. This was confirmed to be the same compound as in Example 32. I

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

What is claimed is: l. A compound of the formula,

3. A compound of the formula,

CH=C-CONH,

CN up,

N OH

I-LC, 

1. A COMPOUND FORMULA,
 2. The compound according to claim 1 wherein each of R1 and R2 is C1-C4 alkyl.
 3. A compound of the formula, 